precentor (n.)youdaoicibaDictYouDict[precentor 词源字典]
1610s, from Late Latin praecentor "a leader in singing," from Latin praecantare "to sing before," from prae "before" (see pre-) + canere "to sing" (see chant (v.)). For change of vowel, see biennial.[precentor etymology, precentor origin, 英语词源]